UBUNTU-CVE-2021-22903

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Source
https://ubuntu.com/security/CVE-2021-22903
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-22903.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-22903
Upstream
Published
2021-06-11T16:15:00Z
Modified
2025-09-08T16:46:58Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability. Specially crafted Host headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. This is similar to CVE-2021-22881. Strings in config.hosts that do not have a leading dot are converted to regular expressions without proper escaping. This causes, for example, config.hosts << "sub.example.com" to permit a request with a Host header value of sub-example.com.

References

Affected packages

Ubuntu:22.04:LTS

rails

Package

Name
rails
Purl
pkg:deb/ubuntu/rails@2:6.1.4.1+dfsg-8ubuntu2?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2:6.*

2:6.0.3.7+dfsg-2
2:6.1.4.1+dfsg-8ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "rails"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-actioncable"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-actionmailbox"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-actionmailer"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-actionpack"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-actiontext"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-actionview"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-activejob"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-activemodel"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-activerecord"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-activestorage"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-activesupport"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-rails"
        },
        {
            "binary_version": "2:6.1.4.1+dfsg-8ubuntu2",
            "binary_name": "ruby-railties"
        }
    ]
}

Ubuntu:24.04:LTS

rails

Package

Name
rails
Purl
pkg:deb/ubuntu/rails@2:6.1.7.3+dfsg-3?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2:6.*

2:6.1.7.3+dfsg-2build1
2:6.1.7.3+dfsg-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "rails"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-actioncable"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-actionmailbox"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-actionmailer"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-actionpack"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-actiontext"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-actionview"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-activejob"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-activemodel"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-activerecord"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-activestorage"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-activesupport"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-rails"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-3",
            "binary_name": "ruby-railties"
        }
    ]
}

Ubuntu:25.04

rails

Package

Name
rails
Purl
pkg:deb/ubuntu/rails@2:6.1.7.3+dfsg-7?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2:6.*

2:6.1.7.3+dfsg-3
2:6.1.7.3+dfsg-4
2:6.1.7.3+dfsg-7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "rails"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-actioncable"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-actionmailbox"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-actionmailer"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-actionpack"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-actiontext"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-actionview"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-activejob"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-activemodel"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-activerecord"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-activestorage"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-activesupport"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-rails"
        },
        {
            "binary_version": "2:6.1.7.3+dfsg-7",
            "binary_name": "ruby-railties"
        }
    ]
}

Ubuntu:Pro:16.04:LTS

rails

Package

Name
rails
Purl
pkg:deb/ubuntu/rails@2:4.2.6-1ubuntu0.1~esm2?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2:4.*

2:4.1.10-1
2:4.2.5-1
2:4.2.5.1-1
2:4.2.5.2-2
2:4.2.6-1
2:4.2.6-1ubuntu0.1~esm1
2:4.2.6-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2",
            "binary_name": "rails"
        },
        {
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2",
            "binary_name": "ruby-actionmailer"
        },
        {
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2",
            "binary_name": "ruby-actionpack"
        },
        {
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2",
            "binary_name": "ruby-actionview"
        },
        {
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2",
            "binary_name": "ruby-activejob"
        },
        {
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2",
            "binary_name": "ruby-activemodel"
        },
        {
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2",
            "binary_name": "ruby-activerecord"
        },
        {
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2",
            "binary_name": "ruby-activesupport"
        },
        {
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2",
            "binary_name": "ruby-rails"
        },
        {
            "binary_version": "2:4.2.6-1ubuntu0.1~esm2",
            "binary_name": "ruby-railties"
        }
    ]
}

Ubuntu:Pro:18.04:LTS

rails

Package

Name
rails
Purl
pkg:deb/ubuntu/rails@2:4.2.10-0ubuntu4+esm2?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2:4.*

2:4.2.9-2
2:4.2.9-4
2:4.2.10-0ubuntu4
2:4.2.10-0ubuntu4+esm1
2:4.2.10-0ubuntu4+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:4.2.10-0ubuntu4+esm2",
            "binary_name": "rails"
        },
        {
            "binary_version": "2:4.2.10-0ubuntu4+esm2",
            "binary_name": "ruby-actionmailer"
        },
        {
            "binary_version": "2:4.2.10-0ubuntu4+esm2",
            "binary_name": "ruby-actionpack"
        },
        {
            "binary_version": "2:4.2.10-0ubuntu4+esm2",
            "binary_name": "ruby-actionview"
        },
        {
            "binary_version": "2:4.2.10-0ubuntu4+esm2",
            "binary_name": "ruby-activejob"
        },
        {
            "binary_version": "2:4.2.10-0ubuntu4+esm2",
            "binary_name": "ruby-activemodel"
        },
        {
            "binary_version": "2:4.2.10-0ubuntu4+esm2",
            "binary_name": "ruby-activerecord"
        },
        {
            "binary_version": "2:4.2.10-0ubuntu4+esm2",
            "binary_name": "ruby-activesupport"
        },
        {
            "binary_version": "2:4.2.10-0ubuntu4+esm2",
            "binary_name": "ruby-rails"
        },
        {
            "binary_version": "2:4.2.10-0ubuntu4+esm2",
            "binary_name": "ruby-railties"
        }
    ]
}

Ubuntu:Pro:20.04:LTS

rails

Package

Name
rails
Purl
pkg:deb/ubuntu/rails@2:5.2.3+dfsg-3ubuntu0.1~esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2:5.*

2:5.2.2.1+dfsg-1ubuntu1
2:5.2.3+dfsg-3
2:5.2.3+dfsg-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "rails"
        },
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "ruby-actioncable"
        },
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "ruby-actionmailer"
        },
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "ruby-actionpack"
        },
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "ruby-actionview"
        },
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "ruby-activejob"
        },
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "ruby-activemodel"
        },
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "ruby-activerecord"
        },
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "ruby-activestorage"
        },
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "ruby-activesupport"
        },
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "ruby-rails"
        },
        {
            "binary_version": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "binary_name": "ruby-railties"
        }
    ]
}